The xcel 500bt combines sophisticated sound processing, intuitive menu navigation, and rich electronic control features with an intelligent, forward-thinking approach to design and ergonomics that delivers a hearing protection and enhancement system without precedent in the shooting sports and hunting industries.The xcel 500bt's next-generation sound-activated compression and variable dynamic sound suppression automatically adjusts compression time according to noise level intensity and duration instead of using conventional "fixed-time" compression.Additionally, the xcel 500bt allows the wearer to select between four different listening modes: universal, speech clarity, high frequency, and power boost.The xcel 500bt also comes with programmable auto shut-off, so forgetting to turn the muffs off and accidentally running down batteries is a thing of the past.Bluetooth compatibility is another valuable feature.By pairing the xcel 500bt to a mobile device, calls and notifications connect through the muffs.Messages and conversations can be heard clearly even in noisy environments.Type: Electronic EarmuffColor: Gray/BlackNrr: 26 dBQuantity: 1 PairStyle: Over the HeadBattery: AAAMaterial: Polymer